text: #ifndef COMMON_H
  #define COMMON_H
  
  #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
  
  static inline unsigned maxu(unsigned a, unsigned b) { return a > b ? a : b; }
  
  static inline unsigned minu(unsigned a, unsigned b) { return a <= b ? a : b; }
  
  #define UNUSED(x) (void)(x)
  
  #endif
  